If 4 moles of HCl react with 2 moles of CaCO3 then how many moles of CO2 will be formed?

Answer 1

HCl + CaCO3 → CO2 + CaCl2 + H2O

balance:

2HCl + CaCO3 → CO2 + CaCl2 + H2O

4 mol HCl x 1 mol CO2/2 mol HCl = 2 mol CO2 produced

2 mol CaCO3 x 1 mol CO2/1 mol CaCO3 = 2 mol CO2 produced

Neither reactant is limiting. The theoretical yield o CO2 is 2 mole.

Answer 2